Upsampling

Managing signal sampling rates is essential in digital signal processing to maintain signal integrity. A decimated signal, characterized by a reduced frequency range due to its lower sampling rate, can be upsampled by inserting zeros between each sample. This upsampling process expands the original spectrum and introduces repeated spectral repli...

Consider a decimated signal with a reduced frequency range due to its lower sampling rate.

Insert zeros between each sample to upsample, that introduces repeated spectral replicas at intervals determined by the new Nyquist frequency.

Pass the zero-inserted sequence through a lowpass filter with a cutoff frequency at the new Nyquist...